Structures and piezoelectric properties of (Bi0.5Na 0.5)TiO3-(Na0.5K0.5)NbO3 based lead-free ceramics

L. Liu, L. Fang, H. Fan, H. Dammak, M. Pham Thi

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Lead-free (1-x)(Bi0.5Na0.5)TiO3-xNa 0.5K0.5NbO3, (x = 0-8 mol%) (abbr., BNT-xNKN) solid solutions were fabricated by mechanical alloying technique. XRD and SEM showed the crystal structure of the samples become more tetragonal and their grain size become small with the increase of substitution. Dielectric studies revealed that the phase transition temperatures shift to low temperature with the increase of NKN. The piezoelectric properties of BNT-xNKN can not be enhanced with the increase of NKN, but their dielectric properties have been improved. The results show that the BNT-xNKN ceramics are one of the promising lead-free materials for capacitor applications.

Original languageEnglish
Pages (from-to)240-246
Number of pages7
JournalFerroelectrics
Volume404
Issue number1
DOIs
StatePublished - 2010
Event12th International Meeting on Ferroelectricity, IMF-12 and the 18th IEEE International Symposium on Applications of Ferroelectrics, ISAF-18 - Xi'an, China
Duration: 23 Aug 200927 Aug 2009

Keywords

  • (BiNa)TiO
  • Mechanical alloying technique
  • NaK NbO
  • Solid solution

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